Benson, R.H. and Collinson, C. (1958a) Three ostracode faunas from Lower and Middle Mississippian strata in southern Illinois. Illinois Geol.Survey, Circ. 255, 1–26.
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Benson, R. H.; Collinson, C.
1958
Three ostracode faunas from Lower and Middle Mississippian strata in southern Illinois